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A B-52 Stratofortress from Minot Air Force Base, N.D., trails behind a KC-135 Stratotanker from McConnell Air Force Base, Kan., during an air refueling exercise, Nov. 6, 2014. The KC-135 was operated by an aircrew made up of Air Force Reservists assigned to the 931st Air Refueling Group at McConnell. The KC-135 Stratotanker serves as the core of the U.S. Air Force's air refueling fleet and has been excelling in that role for more than 50 years. (U.S. Air Force photo by Senior Master Sgt. Ray Lewis.)